WO2023174380A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

Info

Publication number
WO2023174380A1
WO2023174380A1 PCT/CN2023/081980 CN2023081980W WO2023174380A1 WO 2023174380 A1 WO2023174380 A1 WO 2023174380A1 CN 2023081980 W CN2023081980 W CN 2023081980W WO 2023174380 A1 WO2023174380 A1 WO 2023174380A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
sleeve
valve needle
electronic expansion
needle body
Prior art date
Application number
PCT/CN2023/081980
Other languages
English (en)
French (fr)
Inventor
金钜
王傅钢
杨忠宇
Original Assignee
浙江盾安人工环境股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202220573034.XU external-priority patent/CN219345507U/zh
Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Publication of WO2023174380A1 publication Critical patent/WO2023174380A1/zh

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present application relates to the technical field of control valves, and specifically to an electronic expansion valve.
  • electronic expansion valves generally have a nut sleeve and a screw rod in the accommodation cavity of the valve housing.
  • the screw rod is threadedly connected to the nut sleeve
  • the valve needle is connected to the screw rod
  • the screw drives the valve needle to block or open the valve port.
  • the present application provides an electronic expansion valve to solve the problem of low flow control accuracy of the electronic expansion valve in the prior art.
  • This application provides an electronic expansion valve, which includes: a valve housing having an accommodating cavity and a valve port, and the valve port is connected with the accommodating cavity; a nut sleeve, the nut sleeve is arranged in the accommodating cavity, and the nut sleeve is fixedly connected to the valve shell; a screw rod , the screw has a first end and a second end that are oppositely arranged.
  • the screw is inserted into the nut sleeve and is threadedly connected to the nut sleeve; the valve needle assembly is set corresponding to the valve port.
  • the second end of the screw is connected to the valve needle assembly and is driven by the screw.
  • the valve needle assembly blocks or opens the valve port; the pressure spring is arranged between the valve needle assembly and the nut sleeve, and the pressure spring can make the threads of the screw fit the threads of the nut sleeve.
  • the use of a pressure spring can ensure that the position of the screw relative to the nut sleeve is not affected by the thread gap during the upward and downward movements of the screw, thereby enabling the valve to move freely during the upward and downward movements of the screw.
  • the degree to which the needle assembly opens the valve port is not affected by the thread clearance, thereby ensuring high accuracy of flow control of the electronic expansion valve.
  • the nut sleeve has a first through hole extending in the axial direction.
  • the first through hole includes a threaded section and a guide section.
  • the threaded section is arranged away from the valve port.
  • the inside of the guide section is provided with a guide ring that is connected to at least part of the valve housing. , both ends of the pressure spring are in contact with the guide ring and the valve needle assembly respectively.
  • the valve needle assembly includes a first section and a second section.
  • the outer diameter of the first section of the valve needle assembly is smaller than the outer diameter of the second section of the valve needle assembly.
  • the second section of the valve needle assembly is disposed close to the valve port.
  • the first section of the needle assembly is connected to the second end of the screw, and
  • the pressure spring is movably arranged in the guide ring.
  • the pressure spring is sleeved on the outside of the first section of the valve needle assembly. One end of the pressure spring is in contact with the guide ring. The other end of the pressure spring is in contact with the second section of the valve needle assembly away from the valve. One end of the mouth touches.
  • the two ends of the pressure spring are respectively in contact with the guide ring and the end surface of the first section of the valve needle assembly.
  • the pressure spring is sleeved on the first section of the valve needle assembly, which can make the internal structure of the electronic expansion valve compact and occupy a small space, thereby making the overall volume of the electronic expansion valve smaller and improving the structural stability of the pressure spring. better.
  • the valve needle assembly includes a valve needle body and a spring sleeve.
  • the valve needle body includes a connecting end and a blocking end arranged oppositely. The connecting end is connected to the spring sleeve.
  • the valve needle body is located close to the valve port.
  • the spring sleeve forms the core of the valve needle assembly. In the first section, the valve needle body forms the second section of the valve needle assembly.
  • the spring sleeve and the guide ring are in clearance fit.
  • the pressure spring sleeve is set outside the spring sleeve. One end of the pressure spring is in contact with the connecting end, and the blocking end corresponds to the valve port settings. That is, the pressure spring is disposed between the connecting end of the valve needle body and the guide ring.
  • the guide ring guides the spring sleeve so that the screw drives the spring sleeve and the valve needle body to move in the axial direction.
  • the compression spring can also be disposed between the spring sleeve and the nut sleeve.
  • a connecting protruding portion is provided on the end face of the connecting end, the connecting protruding portion is inserted into the spring sleeve, and the connecting protruding portion is fixedly connected to the inner wall of the spring sleeve.
  • the connecting protrusion penetrates the spring sleeve and is fixedly connected to the inner wall of the spring sleeve, so that the valve needle body is firmly connected in the spring sleeve, thereby improving the structural stability between the valve needle body and the spring sleeve.
  • the connection protrusion and the spring sleeve can be connected by welding.
  • valve housing includes: a valve core sleeve, the valve port is arranged on the valve core sleeve; a valve seat, a second through hole is provided in the valve seat, the valve seat has a first end and a second end arranged oppositely, and a third end of the valve seat is provided.
  • the two ends are fixedly connected to the valve core sleeve, the second through hole is connected to the valve port, the valve needle body is arranged in the second through hole, and the outer wall of the valve needle body is in clearance fit with the inner wall of the second through hole; the valve cover is inside the valve cover
  • An accommodating portion is provided, the valve cover has a first end and a second end that are oppositely arranged, the second end of the valve cover is fixedly connected to the first end of the valve seat, the accommodating portion communicates with the second through hole, and the two form an accommodating cavity.
  • the outer wall of the valve needle body is guided and matched with the inner wall of the second through hole, so that the second through hole can guide the valve needle body, further improving the coaxiality between the valve needle body and the valve port.
  • the first end of the valve cover is in a blocked state, that is, the top of the accommodating portion is in a blocked state.
  • the outer wall of the valve needle body is provided with an annular recessed portion, and an annular sealing ring is provided in the annular recessed portion.
  • the annular sealing ring is used to seal between the inner wall of the second through hole and the outer wall of the valve needle body. Providing an annular sealing ring can prevent fluid from entering between the spring sleeve and the second through hole, thereby preventing the fluid from corroding the pressure spring and increasing the service life of the pressure spring.
  • a limiting protrusion is also provided on the end face of the connection end of the valve needle body.
  • the limiting protrusion is annularly arranged on the outer periphery of the spring sleeve, and the pressure spring is located inside the limiting protrusion.
  • the limiting protrusion is provided so that the pressure spring is located between the limiting protrusion and the spring sleeve, which can guide the pressure spring and prevent the pressure spring from twisting and deforming.
  • valve needle assembly includes a valve needle body
  • valve housing includes: a valve seat, the valve needle body is installed in the valve seat; the valve core is installed at one end of the valve seat, and the valve core has a valve port; wherein, the material hardness of the valve core The material hardness of the valve needle body is less than that of the valve needle body.
  • the end of the valve core close to the valve needle body is provided with an installation contact surface and an escape surface.
  • a step structure is formed between the installation contact surface and the escape surface.
  • the inner wall surface or escape surface of the valve core forms a sealing surface.
  • the sealing surface contacts the outer wall surface of the valve needle body to form a soft sealing structure.
  • the mounting contact surface protrudes from the avoidance surface to form a step structure.
  • a sealing contact portion is provided at an end of the valve needle body close to the valve core.
  • the sealing contact portion contacts the sealing surface to form a soft sealing structure.
  • the sealing contact portion is an arc-shaped structure.
  • sealing contact portion is located at the connection between the end of the valve needle body and the outer wall of the valve needle body, and the sealing contact portion is an arc transition structure.
  • valve core is made of non-metallic material, and the valve seat abuts against the installation contact surface to fix the valve core.
  • the valve seat has a first installation port and a second installation port arranged oppositely in the axial direction and a communication channel radially penetrating the valve seat.
  • the first installation port is located above the second installation port, and the communication channel is provided on the valve seat.
  • the side wall is located between the first installation port and the second installation port.
  • the cross-sectional area of the second installation port is larger than the cross-sectional area of the first installation port.
  • the shape of the second installation port matches the shape of the valve core so that the valve The core is installed at the second installation port.
  • the inner wall surface of the valve core is a tapered surface, and the inner wall surface of the valve core forms a sealing surface.
  • the valve core has a first end and a second end arranged oppositely. The first end is located above the second end, along the first end to In the extending direction of the second end, the flow area of the sealing surface gradually decreases.
  • a balance channel is provided in the valve needle body to balance the pressure at both ends of the valve needle body.
  • valve housing further includes: a valve core sleeve, at least part of the valve core sleeve is installed in the second installation port, and the valve core sleeve is located at an end of the valve core away from the valve needle body;
  • the valve core sleeve includes: a main body part, at least part of the main body part The part is inserted into the second installation port, and the end of the main part is in contact with the end of the valve core; the positioning part is protruding from the outer wall of the main part, and the positioning part is used to contact and position the end of the valve seat.
  • the positioning part and the end of the valve seat are connected by welding.
  • valve housing includes a valve seat and a valve core, the valve core is installed at one end of the valve seat, and the valve core forms a valve port;
  • valve needle assembly includes: a valve needle body, a spring sleeve and a buffer spring, and the valve needle body is installed in the valve seat.
  • the buffer spring is installed in the spring sleeve, the screw is movably installed on one end of the spring sleeve, and the other end of the spring sleeve is connected to the valve needle body;
  • the electronic expansion valve also includes: a guide ring, which is set on the valve seat, and is set on the guide ring There is a guide channel, and the spring sleeve is movably arranged in the guide channel along the extension direction of the guide channel; wherein, the valve seat is provided with a first balance hole to penetrate the inner cavity of the valve seat and the inner cavity of the valve seat through the first balance hole. External space setting.
  • the guide ring and the valve seat have an integral structure; or the guide ring and the valve seat have a separate structure.
  • the electronic expansion valve also includes a pressure sleeve, which is arranged on the valve seat and protrudes from the end of the valve seat.
  • the pressure sleeve has an annular structure and is set on the outside of the spring sleeve.
  • the pressure sleeve and the valve seat are integrally formed. structure, or the pressure sleeve and the valve seat are separate structures;
  • the valve housing includes a valve cover, the opening of the valve cover is connected to the end of the pressure sleeve away from the valve seat, and the screw is movably arranged in the valve cover.
  • the electronic expansion valve further includes a nut sleeve, the inner wall of the nut sleeve is in contact with the outer wall of the guide ring, and the nut sleeve is provided with a first flow hole and a communication hole between the internal cavity of the nut sleeve and the outer space of the nut sleeve.
  • the end of the valve seat close to the guide ring has a connecting end surface, and the connecting end surface is connected to the guide ring.
  • the first balancing hole is located at the edge of the connecting end surface, so that the first balancing hole forms a side opening hole structure.
  • a second balance hole is provided on the side wall of the spring sleeve.
  • the valve housing has an accommodating cavity and a valve port, a nut sleeve is arranged in the accommodating cavity, the screw is threadedly connected to the nut sleeve, the second end of the screw is connected to the valve needle assembly and the screw drives the valve needle assembly to block or Open the valve port, and the pressure spring is set between the valve needle assembly and the nut sleeve.
  • the pressure spring can keep the threaded connection between the screw rod and the nut sleeve always keeping the upper sides of the two threads in contact, or always keeping the lower sides of the two threads in contact, so that the screw rod is upward or upward relative to the nut sleeve.
  • the valve needle assembly opens the valve port to different degrees, which enables the electronic expansion valve to have higher flow control accuracy.
  • Figure 1 shows a schematic structural diagram of an electronic expansion valve provided according to an embodiment of the present application
  • Figure 2 shows a partial enlarged view of part A in Figure 1;
  • Figure 3 shows a schematic structural diagram of a partial structure of an electronic expansion valve provided according to an embodiment of the present invention
  • Figure 4 shows an exploded view of the partial structure in Figure 3;
  • Figure 5 shows a schematic diagram of the installation structure of a screw, a bearing and a spring sleeve according to an embodiment of the present invention
  • Figure 6 shows a schematic structural diagram of a bearing sleeve provided on a screw according to an embodiment of the present invention
  • Figure 7 shows a schematic structural diagram of the structure in Figure 3 installed on a mounting base.
  • Valve housing 11. Accommodating cavity; 12. Valve port; 13. Valve core sleeve; 131. Main body part; 132. Positioning part; 14. Valve seat; 141. The first end of the valve seat; 142. The valve seat Second end; 143. Second through hole; 144. First balancing hole; 15. Valve cover; 151. Accommodation part; 152. Second end of the valve cover; 153. First end of the valve cover; 16. Flow adjustment Ring; 17. Valve core; 171. Installation contact surface; 172. Avoidance surface; 173. Inner wall surface; 20. Nut sleeve; 21. First through hole; 211. Threaded section; 212. Guide section; 22. First flow hole; 23. Second flow hole; 30. Screw; 31.
  • Second end of screw 41.
  • Spring sleeve 411. Second balancing hole; 42.
  • Valve needle body 421. Connection end; 4211, connecting convex part; 422, blocked end; 423, annular recessed part; 424, annular sealing ring; 425, sealing contact part; 43, bearing; 431, inner ring; 432, outer ring; 44, connection 441.
  • Embodiment 1 of the present application provides an electronic expansion valve, including a valve housing 10 , a nut sleeve 20 , a screw 30 , a valve needle assembly and a pressure spring 50 .
  • the valve housing 10 has an accommodating cavity 11 and a valve port 12, and the valve port 12 is connected with the accommodating cavity 11; the nut sleeve 20 is arranged in the accommodating cavity 11, and the nut sleeve 20 is fixedly connected to the valve shell 10; the screw rod 30 has a first oppositely arranged end and the second end, the first end 31 of the screw is set away from the valve port 12, the screw 30 is inserted into the nut sleeve 20 and is threadedly connected to the nut sleeve 20; the valve needle assembly is set corresponding to the valve port 12, and the second end 32 of the screw is Connected to the valve needle assembly, the screw 30 drives the valve needle assembly to block or open the valve port 12; the pressure spring 50 is provided between the valve needle assembly and the nut sleeve 20, and the pressure spring 50 can cause the threads of the screw 30 to contact the threads of the nut sleeve 20 fit together.
  • the pressure spring 50 always maintains a compressed state or an extended state. In this application, if the pressure spring 50 always remains in a compressed state, the pressure spring 50 can be used to keep the threaded underside of the screw rod 30 in contact with the threaded underside of the nut sleeve 20; if the pressure spring 50 always remains in an extended state, Then, the pressure spring 50 can keep the upper surface of the thread of the screw rod 30 in contact with the upper surface of the thread of the nut sleeve 20 . Therefore, by using the pressure spring 50, the position of the screw 30 relative to the nut sleeve 20 is not affected by the thread clearance during the upward movement and downward movement of the screw 30, thereby enabling the screw 30 to move upward and downward. During the downward movement, the degree to which the valve needle assembly opens the valve port is not affected by the thread clearance, thereby ensuring high accuracy of flow control of the electronic expansion valve.
  • the valve housing 10 has an accommodating cavity 11 and a valve port 12.
  • the nut sleeve 20 is arranged in the accommodating cavity 11.
  • the screw rod 30 is threadedly connected to the nut sleeve 20.
  • the second end 32 of the screw rod is connected to the valve needle assembly.
  • the screw 30 drives the valve needle assembly to block or open the valve port 12 , and the pressure spring 50 is disposed between the valve needle assembly and the nut sleeve 20 .
  • the pressure spring 50 can keep the threaded connection between the screw rod 30 and the nut sleeve 20 so that the upper sides of the two threads are always in contact, or the lower sides of the two threads are always in contact, so that the screw rod 30 is opposite to the nut.
  • the position of the screw 30 relative to the nut sleeve 20 is not affected by the thread clearance, so that the degree to which the valve needle assembly opens the valve port 12 is not affected by the thread clearance, thereby avoiding the possibility of the screw 30
  • the valve needle assembly opens the valve port 12 to different degrees, which enables the electronic expansion valve to have higher flow control accuracy.
  • the above technical solution also has the advantages of simple structure, low manufacturing cost, and simple installation.
  • the nut sleeve 20 has a first through hole 21 extending in the axial direction.
  • the first through hole 21 includes a threaded section 211 and a guide section 212.
  • the threaded section 211 is disposed away from the valve port 12, and the guide section 212 is provided internally.
  • the threaded section 211 is threadedly connected to the screw rod 30 .
  • the valve needle assembly is disposed in the guide ring 60 , and the guide ring can guide the valve needle assembly, thereby improving the coaxiality between the valve needle assembly and the valve port 12 .
  • the guide ring 60 is disposed on the inner wall of the guide section 212, and the two ends of the pressure spring 50 are respectively in contact with the guide ring 60 and the valve needle assembly. This can make the diameter of the pressure spring 50 smaller, thereby preventing the pressure spring 50 from colliding with the valve needle assembly.
  • the inner walls of the accommodation cavity 11 rub against each other.
  • the guide ring 60 is connected to the nut sleeve 20 by welding, or the two can be fixedly connected together by integral injection molding.
  • the valve needle assembly includes a first section and a second section.
  • the outer diameter of the first section of the valve needle assembly is smaller than the outer diameter of the second section of the valve needle assembly.
  • the second section of the valve needle assembly is disposed close to the valve port 12,
  • the first section of the valve needle assembly is connected to the second end 32 of the screw, And is movably arranged in the guide ring 60.
  • the pressure spring 50 is sleeved on the outside of the first section of the valve needle assembly. One end of the pressure spring is in contact with the guide ring 60, and the other end of the pressure spring 50 is in contact with the third section of the valve needle assembly. One end of the second section away from the valve port 12 is in contact with each other.
  • the guide ring 60 is used to guide the first section of the valve needle assembly.
  • the two ends of the pressure spring 50 offset the guide ring 60 and the end surface of the first section of the valve needle assembly respectively. connection, and the pressure spring 50 is set on the first section of the valve needle assembly. This can make the internal structure of the electronic expansion valve compact and occupy a small space, thereby making the overall volume of the electronic expansion valve smaller, and also making the pressure spring 50 The structural stability is better.
  • the valve needle assembly includes a valve needle body 42 and a spring sleeve 41.
  • the valve needle body 42 includes a connecting end 421 and a blocking end 422 arranged oppositely.
  • the connecting end 421 is connected to the spring sleeve 41, and the valve needle body 42 is close to
  • the valve port 12 is set, the spring sleeve 41 forms the first section of the valve needle assembly, the valve needle body 42 forms the second section of the valve needle assembly, the spring sleeve 41 and the guide ring 60 are in a clearance fit, and the pressure spring 50 is set in the spring sleeve 41
  • one end of the pressure spring 50 is in contact with the connecting end 421, the connecting end 421 is fixedly connected to the spring sleeve 41, and the blocking end 422 is provided corresponding to the valve port 12.
  • the pressure spring is provided between the connecting end 421 of the valve needle body 42 and the guide ring 60 .
  • the guide ring 60 guides the spring sleeve 41 so that the screw 30 drives the spring sleeve 41 and the valve needle body 42 to move in the axial direction.
  • the pressure spring 50 can also be disposed between the spring sleeve 41 and the nut sleeve 20 .
  • the valve needle assembly also includes a bearing 43.
  • the bearing 43 is arranged in the spring sleeve 41.
  • the bearing 43 includes an inner ring 431 and an outer ring 432.
  • the inner ring 431 is sleeved and fixedly connected to the second end 32 of the screw.
  • the inner wall of the spring sleeve 41 has a clearance fit with the outer ring 432, and the inner wall of the spring sleeve 41 is used to guide the outer ring 432.
  • the bearing 43 is provided so that while the inner ring 431 rotates with the screw 30, the outer ring 432, the spring sleeve 41 and the valve needle body 42 do not rotate with the screw 30.
  • the inner wall of the spring sleeve 41 is used to guide the outer ring 432, so that the bearing 43 and the screw 30 will not be skewed when the bearing 43 moves in the axial direction with the screw 30, thereby improving the coaxiality between the screw 30 and the valve port 12, and thus enabling Improve the coaxiality between the valve needle assembly and the valve port.
  • the valve needle assembly also includes a connecting piece 44 and a buffer spring 45 arranged sequentially along the axial direction.
  • the buffer spring 45 is arranged close to the valve port 12.
  • the connecting piece 44 and the buffer spring 45 are both located in the spring sleeve 41.
  • the component 44 includes a first section and a second section.
  • the second section 442 of the connector is disposed close to the valve port 12.
  • the diameter of the first section 441 of the connector is larger than the diameter of the second section 442 of the connector.
  • the first section 442 of the connector is 441 is in contact with the outer ring 432.
  • One end of the buffer spring 45 is set on the outside of the second section 442 of the connector and is in contact with the end surface of the first section 441 of the connector.
  • the other end of the buffer spring 45 is in contact with the valve needle body. 42 butt. Adopting the above structural arrangement, the structural stability between the connecting piece 44, the buffer spring 45 and the outer ring 432 can be better, so that the overall structural stability of the valve needle assembly can be better.
  • the connecting piece 44 is used to connect the buffer spring 45 and the outer ring 432.
  • a through hole is provided in the connecting piece 44, and the through hole is used to avoid the inner ring 431 and the second end 32 of the screw rod.
  • the buffer spring 45 is used to buffer the thrust between the screw 30 and the valve needle body 42 to prevent the screw 30 from continuing to move downward and excessively squeezing the valve needle body 42 after the valve needle body 42 blocks the valve port 12 .
  • a connecting protruding portion 4211 is provided on the end surface of the connecting end 421 .
  • the connecting protruding portion 4211 is inserted into the spring sleeve 41 , and the connecting protruding portion 4211 is fixedly connected to the inner wall of the spring sleeve 41 .
  • the connecting protrusion 4211 is penetrated in the spring sleeve 41 and is fixedly connected to the inner wall of the spring sleeve 41 , so that the valve needle body 42 is firmly connected in the spring sleeve 41 , thereby reducing the gap between the valve needle body 42 and the spring sleeve 41 .
  • the connection protrusion 4211 and the spring sleeve 41 may be connected by welding.
  • the valve housing 10 includes a valve core sleeve 13 , a valve seat 14 and a valve cover 15 .
  • the valve port 12 is provided on the valve core sleeve 13 .
  • the valve seat 14 has a first end and a second end that are oppositely arranged.
  • the second end 142 of the valve seat is fixedly connected to the valve core sleeve 13.
  • the second through hole 143 is connected to the valve port 12.
  • the valve needle body 42 is disposed in the second through hole 143, and the outer wall of the valve needle body 42 guides and cooperates with the inner wall of the second through hole 143; a receiving portion 151 is provided in the valve cover 15, and the valve cover 15 has an oppositely arranged third One end and the second end, the second end 152 of the valve cover is fixedly connected to the first end 141 of the valve seat, the accommodating part 151 is connected with the second through hole 143 and the two form the accommodating cavity 11 .
  • the above structure facilitates the installation of internal components of the electronic expansion valve.
  • the nut sleeve 20 can be fixedly connected to the end surface of the first end 141 of the valve seat, which facilitates the installation of the nut sleeve 20 .
  • the outer wall of the valve needle body 42 guides and cooperates with the inner wall of the second through hole 143, so that the second through hole 143 can guide the valve needle body 42, further improving the coaxiality between the valve needle body 42 and the valve port 12.
  • the first end 153 of the valve cover is in a blocked state, that is, the top of the receiving portion 151 is in a blocked state.
  • a flow adjustment ring 16 and a valve core 17 are provided between the valve core sleeve 13 and the valve seat 14.
  • the flow adjustment ring 16 is provided close to the valve seat 14 and is located outside the valve needle body 42, and the valve core 17 is close to the valve core 14.
  • the valve port 12 is provided. When the valve needle body 42 blocks the valve port 12, it abuts against the valve core 17.
  • the valve core 17 may be a soft sealing gasket.
  • the flow adjustment ring 16 has a flow through hole, which is set corresponding to the valve port 12. By adjusting the shape of the inner wall of the flow through hole, the flow characteristic curve of the electronic expansion valve can be adjusted; the valve core 17 is used to achieve a soft seal of the valve port 12, to avoid There is leakage in the electronic expansion valve when the valve port 12 is in a closed state.
  • the guide ring 60 is integrated with the valve seat 14.
  • the guide ring 60 is provided with a communication hole, and the areas above and below the guide ring 60 in the accommodation cavity 11 are connected through the communication hole.
  • the outer wall of the valve needle body 42 is provided with an annular recessed portion 423, and an annular sealing ring 424 is provided in the annular recessed portion 423.
  • the annular sealing ring 424 is used to seal between the inner wall of the second through hole 143 and the outer wall of the valve needle body 42. seal between.
  • An annular sealing ring 424 is provided in the annular recessed portion 423 to prevent the annular sealing ring 424 from being separated from the valve needle body 42 .
  • the annular sealing ring 424 is provided to prevent fluid from entering between the spring sleeve 41 and the second through hole 143, thereby preventing the fluid from corroding the pressure spring and increasing the service life of the pressure spring.
  • a limiting protrusion is also provided on the end surface of the connecting end 421 of the valve needle body 42.
  • the limiting protrusion is annularly arranged on the outer periphery of the spring sleeve 41, and the pressure spring 50 is located inside the limiting protrusion.
  • the limiting protrusion is provided so that the pressure spring 50 is located between the limiting protrusion and the spring sleeve 41 to guide the pressure spring 50 and thereby prevent the pressure spring 50 from twisting and deforming.
  • Embodiment 2 of the present application provides an electronic expansion valve.
  • the electronic expansion valve also includes a valve core 17 and a driving assembly.
  • the valve needle body 42 is installed in the valve seat 14 .
  • the valve core 17 is installed in the valve seat 14 , and the valve core 17 is installed at one end of the valve seat 14 .
  • the valve core 17 is sleeved on the valve needle body 42, and the valve core 17 forms a valve port.
  • the hollow structure of the valve core 17 forms the valve port.
  • the driving assembly drives the valve needle body 42 to move axially to open and close the valve port.
  • the material hardness of the valve core 17 is smaller than the material hardness of the valve needle body 42.
  • the end of the valve core 17 close to the valve needle body 42 is provided with a mounting contact surface 171 and an escape surface 172.
  • the installation contact surface 171 and the escape surface 172 form a Step structure.
  • the inner wall surface 173 or the relief surface 172 of the valve core 17 forms a sealing surface, and the sealing surface contacts the outer wall surface of the valve needle body 42 to form a soft sealing structure.
  • the mounting contact surface 171 is used to make mating contact with other components of the electronic expansion valve, so as to position the mounting contact surface 171 through other components of the electronic expansion valve.
  • the material hardness of the valve core 17 is smaller than the material hardness of the valve needle body 42, it is easy to form a soft sealing structure between the sealing surface and the outer wall surface of the valve needle body 42. In this way, through the soft sealing structure can have This effectively avoids leakage between the valve core 17 and the valve seat 14, and improves the sealing performance of the electronic expansion valve.
  • the soft sealing structure can have This effectively avoids leakage between the valve core 17 and the valve seat 14, and improves the sealing performance of the electronic expansion valve.
  • there is a step structure between the mounting contact surface 171 and the avoidance surface 172 other components of the electronic expansion valve contact and position the valve core 17 through the mounting contact surface 171, and other components of the electronic expansion valve will not interfere with the avoidance surface.
  • the surface 172 is in direct contact, thereby avoiding the deformation of the escape surface 172 or the inner wall surface 173 of the valve core 17 due to the installation compression of the installation contact surface 171 during installation, so that the sealing surface will not be deformed and the pressure installation is reduced.
  • the influence of force on the sealing surface better improves the sealing performance of the electronic expansion valve.
  • since the installation contact surface and the sealing surface are not the same or directly connected, it is also possible to avoid the impact of the material of the valve core 17 on the sealing surface due to thermal expansion and contraction when it comes into contact with other components of the electronic expansion valve. To further improve the sealing performance of the electronic expansion valve. Therefore, through the technical solution provided by this embodiment, the technical problem of poor sealing performance of the electronic expansion valve in the prior art can be solved.
  • the mounting contact surface 171 can be disposed protruding from the avoidance surface 172 to form a step structure.
  • a sealing contact portion 425 is provided at the end of the valve needle body 42 close to the valve core 17 .
  • the sealing contact portion 425 contacts the sealing surface to form a soft sealing structure.
  • the sealing contact portion 425 has an arc-shaped structure.
  • the sealing contact portion 425 in this embodiment is located at the connection between the end of the valve needle body 42 and the outer wall of the valve needle body 42 , and the sealing contact portion 425 is an arc transition structure. Adopting such a structural arrangement can facilitate the valve needle body 42 to better scratch the valve core 17, improve the self-centering effect, improve the sealing performance at the valve port, and reduce the wear of the valve core 17, so as to better The durability of the valve core 17 is greatly improved, thereby effectively increasing the overall service life of the electronic expansion valve.
  • the valve core 17 is made of non-metallic material, and the inner wall or end surface (the end surface can refer to the upper end surface, or the lower end surface, or the upper end surface and the lower end surface) of the valve core 17 forms a sealing surface, and the sealing surface is connected with the valve needle.
  • the outer wall surface of the body 42 forms a soft sealing structure. With such a structural arrangement, a soft sealing structure is formed between the sealing surface and the outer wall surface of the valve needle body 42. In this way, leakage between the valve core 17 and the valve seat 14 can be avoided through this soft sealing structure, thereby improving the efficiency of the electronic expansion valve. sealing performance.
  • the valve core 17 in this embodiment is mainly made of plastic material.
  • the non-metallic material will be a soft material, so that the sealing performance can be improved after the hard material and the soft material are installed together.
  • a soft sealing structure can also be formed between the valve core 17 and the valve seat 14, thereby better improving the sealing performance of the electronic expansion valve.
  • valve seat 14 can be brought into contact with the installation contact surface 171 to fix the valve core 17 to improve the limiting stability of the valve core 17 and prevent the valve core 17 from shaking during operation.
  • valve core 17 in this embodiment is made of polytetrafluoroethylene material to better improve the sealing performance of the electronic expansion valve.
  • the valve seat 14 has a first installation port and a second installation port arranged oppositely in the axial direction.
  • the valve seat 14 is also provided with a communication channel radially penetrating the valve seat 14 .
  • the first installation port is located on the second installation port.
  • a communication channel is provided on the side wall of the valve seat 14 and is located between the first installation port and the first installation port.
  • the cross-sectional area of the second installation port is larger than the cross-sectional area of the first installation port.
  • the shape of the second installation port is the same as that of the first installation port.
  • the shape of the valve core 17 is adapted so that the valve core 17 is installed at the second installation port.
  • valve core 17 can be installed directly from the second installation port, which facilitates the installation operation. Since the valve core 17 can be installed from the second installation port, the valve core can be set to a large diameter, thereby achieving a large flow rate.
  • valve seat 14 has an annular structure, and the valve seat 14 in this embodiment has a circular annular structure.
  • the sealing surface in this embodiment is a tapered surface
  • the valve core 17 has a first end and a second end that are oppositely arranged.
  • the first end is located above the second end along the extending direction from the first end to the second end.
  • the flow area of the sealing surface gradually decreases. Adopting such a structural arrangement can easily improve the sealing performance between the valve core 17 and the valve needle body 42 and reduce the leakage between the valve core 17 and the valve needle body 42 .
  • a balance channel is provided in the valve needle body 42 to balance the pressure at both ends of the valve needle body 42
  • an annular sealing ring 424 is provided between the valve needle body 42 and the valve seat 14 to better improve the sealing performance. This achieves pressure balance at the upper and lower ends of the valve needle in the closed valve state.
  • the annular sealing ring 424 corresponds to the first sealing member.
  • the electronic expansion valve in this embodiment also includes a buffer spring 45, a screw 30 and a bearing 43.
  • One end of the spring sleeve 41 is sleeved on the end of the valve needle body 42, and the buffer spring 45 is installed in the spring sleeve 41.
  • the screw rod 30 is arranged at the other end of the spring sleeve 41; the bearing 43 is sleeved on the screw rod 30, and the bearing 43 is located between the screw rod 30 and the spring sleeve 41.
  • the driving assembly of the electronic expansion valve includes a rotor assembly and a nut assembly.
  • the rotor assembly is sleeved outside the nut assembly.
  • the end of the screw 30 away from the valve needle body 42 is fixedly connected to the rotor assembly.
  • the rotor assembly drives the valve through the screw.
  • the needle body 42 moves axially to adjust the opening of the valve port.
  • the nut assembly is provided with internal threads for threaded connection with the valve needle body 42, and the nut assembly is fixedly connected to the valve seat 14 through a connector.
  • the electronic expansion valve further includes a valve core sleeve 13. At least part of the valve core sleeve 13 is installed in the second installation port. The valve core sleeve 13 is located at an end of the valve core 17 away from the valve needle body 42.
  • the existing integrated valve seat 14 structure is changed to a split structure to facilitate installation operations.
  • the valve core 17 can be easily positioned through the structure of the valve core sleeve 13 to improve the setting stability of the valve core 17, thereby improving the overall performance of the structure.
  • the valve core sleeve 13 can also be sleeved outside the second installation port, as long as the valve core sleeve 13 and the valve needle body 42 can be realized.
  • the valve core sleeve 13 in this embodiment includes a main body part 131 and a positioning part 132. At least part of the main body part 131 is inserted into the second installation port, and the end of the main body part 131 abuts the end of the valve core 17. .
  • the positioning portion 132 protrudes from the outer wall of the main body portion 131 , and is used for contacting and positioning the end portion of the valve seat 14 . Adopting such a structural arrangement can facilitate better positioning operation of the valve core 17 and improve the stability of the valve core 17 .
  • the main body part 131 and the positioning part 132 in this embodiment are integrally formed structures to facilitate production and manufacturing.
  • the positioning portion 132 is connected to the end of the valve seat 14 by welding to further improve the positioning stability of the valve core 17 and also improve the installation stability of the valve core sleeve 13 .
  • the electronic expansion valve in this embodiment also includes a mounting base 100.
  • the mounting base 100 has an installation channel, and the valve seat 14, the valve core 17 and the valve core sleeve 13 are all installed in the installation channel.
  • a second seal 70 may be provided between the mounting base 100 and the valve seat 14 .
  • a third seal 80 may be provided between the mounting base 100 and the valve core sleeve 13 .
  • a second seal 70 may be provided between the mounting base 100 and the valve seat 14
  • a third seal 80 may be provided between the mounting base 100 and the valve core sleeve 13 .
  • a second seal 70 is provided between the mounting base 100 and the valve seat 14
  • a third seal 80 is provided between the mounting base 100 and the valve core sleeve 13 . Adopting such a structural arrangement can better improve the sealing performance of the electronic expansion valve.
  • the mounting base 100 is a valve body or a mounting platform, and the specific installation situation can be determined based on actual use.
  • the valve core 17 in this embodiment is made of soft sealing material to solve the leakage problem.
  • the valve assembly is a flip-chip structure, that is, the valve core 17 is assembled from the bottom up to achieve large flow and internal balance (convenient to open the valve).
  • the valve seat structure is a split structure (the valve seat structure includes the valve seat and the valve core sleeve. The valve The seat and the valve core sleeve are two parts to form a split structure), and the problem of valve port leakage is solved through the settings of the valve seat 14, the valve core 17 and the valve core sleeve 13.
  • the valve core 17 in this embodiment has a large-diameter structure, and there is basically no relative operation between the valve core 17 and the valve needle body 42, which reduces the friction between the valve core 17 and the valve needle body 42 and prevents the soft sealing material from Wear of core 17.
  • the electronic expansion valve of this embodiment further includes a guide ring 60 .
  • the guide ring 60 is disposed on the valve seat 14.
  • the guide ring 60 is provided with a guide channel.
  • the spring sleeve 41 is movably disposed in the guide channel along the extension direction of the guide channel.
  • the valve seat 14 is provided with a first balance hole 144 so as to penetrate the internal cavity of the valve seat 14 and the external space of the valve seat 14 through the first balance hole 144 .
  • the spring sleeve 41 can be easily moved along the extension direction of the guide channel, thereby facilitating the movement of the spring sleeve 41.
  • the movement direction is limited to prevent the movement of the spring sleeve 41 from being offset, thereby preventing the movement of the valve needle body 42 from being offset, preventing the valve needle body 42 from shaking, and improving the stability of the movement of the valve needle body 42.
  • the limiting and guiding effect of the guide channel on the spring sleeve 41 can be achieved by controlling the gap between the wall surface of the guide channel and the outer wall of the spring sleeve 41 within a smaller reasonable range.
  • the upper cavity of the valve seat 14 and the internal cavity of the valve seat 14 can be balanced, so that the pressure of the upper cavity of the valve seat 14 can be balanced with the internal cavity pressure of the valve seat 14. It is convenient to increase the balancing speed of the upper cavity pressure of the valve needle body 42, achieve rapid balancing, and avoid switching difficulties caused by sudden changes in pressure. Therefore, through the technical solution provided by this embodiment, the technical problem of poor motion stability of the valve needle of the electronic expansion valve in the prior art can be solved.
  • the guide ring 60 and the valve seat 14 are integrally formed to further improve the coaxiality.
  • the guide ring 60 and the valve seat 14 may be of separate structure to facilitate processing and installation.
  • the electronic expansion valve also includes a pressure sleeve 120 and a valve cover 15 (also called a sleeve).
  • the pressure sleeve 120 is disposed on the valve seat 14 and protrudes from the end of the valve seat 14.
  • 120 is an annular structure, and the pressure sleeve 120 is set on the spring sleeve 41 outside.
  • the opening of the valve cover 15 is connected to an end of the pressure sleeve 120 away from the valve seat 14 , and the screw 30 is movably disposed in the valve cover 15 . With such a structural arrangement, the arrangement stability of the valve cover 15 can be easily improved.
  • the pressure sleeve 120 and the valve seat 14 are integrally formed to better improve the structural stability.
  • the pressing sleeve 120 and the valve seat 14 have separate structures to facilitate processing and installation.
  • the driving assembly in this embodiment includes a nut sleeve 20.
  • the inner wall of the nut sleeve 20 is in contact with the outer wall of the guide ring 60.
  • the outer wall of the guide ring 60 is in contact with the inner wall of the nut sleeve 20.
  • the guide ring 60 can be used to The nut sleeve 20 is guided and installed to improve the coaxiality between the valve needle body 42 and the valve port.
  • the end of the valve seat 14 close to the guide ring 60 has a connecting end surface, and the connecting end surface is connected to the guide ring 60 .
  • the first balancing hole 144 is located at the edge of the connecting end surface, so that the first balancing hole 144 forms a side opening.
  • the first balance hole By processing the side opening hole structure from the edge of the connection end surface, the first balance hole will not produce burrs toward the inner cavity of the valve seat 14, thereby preventing the valve needle from being damaged by the burrs and affecting the opening and closing of the valve needle.
  • the first balancing hole 144 is located at an edge of the connecting end surface away from the guide ring 60 .
  • a second balance hole 411 is provided on the side wall of the spring sleeve 41 in this embodiment.
  • the second balance hole 411 can communicate with the valve port and the internal cavity of the valve seat 14, and then communicate with the rotor cavity through the first balance hole 144.
  • the rotor cavity is the cavity surrounded by the valve cover 15. body, thereby facilitating the rapid balance of the upper and lower pressures of the valve needle and reducing the unbalanced pressure on the valve needle body 42 when the pressure suddenly changes.
  • the nut sleeve 20 is provided with a first flow hole 22 that communicates between the internal cavity of the nut sleeve 20 and the outer space of the nut sleeve 20 , and a first flow hole 22 that communicates with the upper end cavity and the lower end cavity of the nut sleeve 20 .
  • the second flow hole 23 Specifically, the lower end cavity of the nut sleeve 20 is the upper cavity of the valve seat 14 , and the upper end cavity of the nut sleeve 20 is the rotor cavity. Therefore, the rotor cavity is connected to the valve port through multiple flow channels, so as to achieve rapid balance of the upper and lower pressures of the valve needle body 42 .
  • the rotor cavity can pass through the first flow hole 22, the upper cavity of the valve seat 14, the first balance hole 144, the internal cavity of the valve seat, the second balance hole 411, the internal cavity of the spring sleeve 41 and the valve needle body 42.
  • the balance channel is connected to the valve port; or the rotor cavity is connected to the valve port through the second flow hole 23, the internal cavity of the nut sleeve 20, the internal cavity of the spring sleeve 41, and the balance channel of the valve needle body 42; or
  • the rotor cavity passes through the second flow hole 23, the internal cavity of the nut sleeve 20, the gap between the guide ring 60 and the spring sleeve 41, the internal cavity of the valve seat 14, the second balance hole 411, the internal cavity of the spring sleeve 41,
  • the balance channel of the valve needle body 42 is used to achieve communication with the valve port.
  • valve needle body 42 is located above the valve core sleeve 13 .
  • spatially relative terms can be used here, such as “on", “on", “on the upper surface of", “above”, etc., to describe what is shown in the figure.
  • the exemplary term “over” may include both orientations “above” and “below.”
  • the device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)

Abstract

本申请提供一种电子膨胀阀，包括：阀壳，具有容纳腔和阀口，阀口与容纳腔连通；螺母套，螺母套设置在容纳腔内，螺母套固定连接在阀壳上；螺杆，螺杆具有相对设置的第一端和第二端，螺杆穿设在螺母套内并与螺母套螺纹连接；阀针组件，对应阀口设置，螺杆的第二端与阀针组件连接，螺杆驱动阀针组件封堵或打开阀口；压力弹簧，设置在阀针组件与螺母套之间，压力弹簧能够使螺杆的螺纹与螺母套的螺纹相贴合。采用本申请提供的技术方案，以解决现有技术中的电子膨胀阀的流量控制精度低的问题。

Description

电子膨胀阀
本申请要求于2022年3月16日提交至中国国家知识产权局、申请号为202220573034.X、申请名称为电动阀的专利申请的优先权，于2022年3月17日提交至中国国家知识产权局、申请号为202220586991.6、申请名称为电动阀的专利申请的优先权，以及于2022年3月24日提交至中国国家知识产权局、申请号为202220654238.6、申请名称为电子膨胀阀的专利申请的优先权。
技术领域
本申请涉及控制阀技术领域，具体而言，涉及一种电子膨胀阀。
背景技术
目前，电子膨胀阀一般在阀壳的容纳腔内设置螺母套和螺杆，螺杆与螺母套螺纹连接，阀针与螺杆连接且螺杆驱动阀针封堵或打开阀口。但是，螺母套与螺杆的螺纹连接处存在间隙，当螺杆相对螺母套向上运动时，螺母套的螺纹的上侧面与螺杆的螺纹的上侧面相接触，当螺杆相对螺母套向下运动时，螺母套的螺纹的下侧面与螺杆的螺纹的下侧面相接触，这样导致螺杆在向下、向上移动过程中，当螺杆相对螺母套转动至同一位置时，螺杆相对螺母套的位置受螺纹间隙的影响而存在误差，从而导致阀针相对阀口的位置存在误差，进而导致电子膨胀阀的流量控制精度低。
发明内容
本申请提供一种电子膨胀阀，以解决现有技术中的电子膨胀阀的流量控制精度低的问题。
本申请提供了一种电子膨胀阀，包括：阀壳，具有容纳腔和阀口，阀口与容纳腔连通；螺母套，螺母套设置在容纳腔内，螺母套固定连接在阀壳上；螺杆，螺杆具有相对设置的第一端和第二端，螺杆穿设在螺母套内并与螺母套螺纹连接；阀针组件，对应阀口设置，螺杆的第二端与阀针组件连接，螺杆驱动阀针组件封堵或打开阀口；压力弹簧，设置在阀针组件与螺母套之间，压力弹簧能够使螺杆的螺纹与螺母套的螺纹相贴合。采用压力弹簧，能够使螺杆在向上移动过程中和向下移动的过程中，螺杆相对螺母套的位置不受螺纹间隙的影响，从而能够使螺杆在向上移动过程中和向下移动过程中，阀针组件打开阀口的程度不受螺纹间隙的影响，进而保证电子膨胀阀的流量控制的精度较高。
进一步地，螺母套具有沿轴向延伸的第一通孔，第一通孔包括螺纹段和导向段，螺纹段远离阀口设置，导向段的内部设有与阀壳的至少部分连接的导向环，压力弹簧的两端分别与导向环和阀针组件相抵接。
进一步地，阀针组件包括第一段和第二段，阀针组件的第一段的外径小于阀针组件的第二段的外径，阀针组件的第二段靠近阀口设置，阀针组件的第一段与螺杆的第二端连接，且 可移动地设置在导向环内，压力弹簧套设在阀针组件的第一段的外侧，压力弹簧的一端与导向环抵接，压力弹簧的另一端与阀针组件的第二段的远离阀口的一端抵接。采用上述结构，由于阀针组件的第一段的外径小于阀针组件的第二段的外径，所以压力弹簧的两端分别与导向环和阀针组件的第一段的端面相抵接，且压力弹簧套设在阀针组件的第一段上，这样能够使电子膨胀阀内部的结构紧凑，占用空间小，从而使电子膨胀阀的整体体积较小，还能够使压力弹簧的结构稳定性较好。
进一步地，阀针组件包括阀针本体和弹簧套，阀针本体包括相对设置的连接端和封堵端，连接端与弹簧套连接，阀针本体靠近阀口设置，弹簧套形成阀针组件的第一段，阀针本体形成阀针组件的第二段，弹簧套与导向环为间隙配合，压力弹簧套设在弹簧套的外侧，压力弹簧的一端与连接端抵接，封堵端对应阀口设置。即，压力弹簧设置在阀针本体的连接端和导向环之间。且导向环对弹簧套进行导向，以使螺杆驱动弹簧套和阀针本体沿轴向移动。在其他实施例中，还可将压力弹簧设置在弹簧套和螺母套之间。
进一步地，连接端的端面上设置有连接凸起部，连接凸起部穿设在弹簧套内，连接凸起部与弹簧套的内壁固定连接。连接凸起部穿设在弹簧套内且与弹簧套的内壁固定连接，这样使阀针本体稳固地连接在弹簧套内，从而使阀针本体与弹簧套之间的结构稳定性更好。连接凸起部与弹簧套之间可通过焊接连接。
进一步地，阀壳包括：阀芯套，阀口设置在阀芯套上；阀座，阀座内具有第二通孔，阀座具有相对设置的第一端和第二端，阀座的第二端与阀芯套固定连接，第二通孔与阀口连通，阀针本体设置在第二通孔内，阀针本体的外壁与第二通孔的内壁间隙配合；阀盖，阀盖内设置有容纳部，阀盖具有相对设置的第一端和第二端，阀盖的第二端与阀座的第一端固定连接，容纳部与第二通孔连通且两者形成容纳腔。阀针本体的外壁与第二通孔的内壁导向配合，这样第二通孔可对阀针本体进行导向，进一步提高了阀针本体和阀口的同轴度。阀盖的第一端为封堵状态，即容纳部的顶部为封堵状态。
进一步地，阀针本体的外壁设置有环形凹陷部，环形凹陷部内设置有环形密封圈，环形密封圈用于对第二通孔的内壁和阀针本体的外壁之间进行密封。设置环形密封圈，能够防止流体进入弹簧套和第二通孔之间，从而防止了流体腐蚀压力弹簧，提高了压力弹簧的使用寿命。
进一步地，阀针本体的连接端的端面上还设置有限位凸起，限位凸起环形设置在弹簧套的外周，压力弹簧位于限位凸起内侧。设置限位凸起，使压力弹簧位于限位凸起和弹簧套之间，能够对压力弹簧进行导向，从而能够防止压力弹簧扭曲变形。
进一步地，阀针组件包括阀针本体，阀壳包括：阀座，阀针本体安装在阀座内；阀芯，安装在阀座的一端，阀芯具有阀口；其中，阀芯的材料硬度小于阀针本体的材料硬度，阀芯靠近阀针本体的端部设置有安装接触面和避让面，安装接触面与避让面之间形成台阶结构，阀芯的内壁面或避让面形成密封面，密封面与阀针本体的外壁面接触以形成软密封结构。
进一步地，安装接触面凸出于避让面设置以形成台阶结构。
进一步地，阀针本体靠近阀芯的端部设置有密封接触部，密封接触部与密封面接触以形成软密封结构，密封接触部为弧形结构。
进一步地，密封接触部位于阀针本体的端部和阀针本体的外侧壁之间的连接处，密封接触部为圆弧过渡结构。
进一步地，阀芯由非金属材料制成，阀座与安装接触面抵接以固定阀芯。
进一步地，阀座具有沿轴向相对设置的第一安装口和第二安装口以及径向贯通阀座的连通通道，第一安装口位于第二安装口的上方，连通通道设置于阀座的侧壁并位于第一安装口与第二安装口之间，第二安装口的截面面积大于第一安装口的截面面积，第二安装口的外形与阀芯的外形相适配，以使阀芯安装在第二安装口处。
进一步地，阀芯的内壁面为锥形面，阀芯的内壁面形成密封面，阀芯具有相对设置的第一端和第二端，第一端位于第二端的上方，沿第一端至第二端的延伸方向上，密封面的流通面积逐渐减小。
进一步地，阀针本体内设有平衡通道以平衡阀针本体两端压力。
进一步地，阀壳还包括：阀芯套，阀芯套的至少部分安装在第二安装口内，阀芯套位于阀芯远离阀针本体的一端；阀芯套包括：主体部，主体部的至少部分插设在第二安装口内，主体部的端部抵接在阀芯的端部；定位部，凸出于主体部的外壁设置，定位部用于与阀座的端部进行抵接定位，定位部与阀座的端部通过焊接连接。
进一步地，阀壳包括阀座和阀芯，阀芯安装在阀座的一端，阀芯形成阀口；阀针组件包括：阀针本体、弹簧套和缓冲弹簧，阀针本体安装在阀座内，缓冲弹簧安装在弹簧套内，螺杆可活动地安装在弹簧套的一端，弹簧套的另一端与阀针本体连接；电子膨胀阀还包括：导向环，设置在阀座上，导向环上设置有导向通道，弹簧套沿导向通道的延伸方向可移动地设置在导向通道内；其中，阀座上设置有第一平衡孔，以通过第一平衡孔贯通阀座的内部空腔与阀座的外部空间设置。
进一步地，导向环和阀座为一体成型结构；或者，导向环和阀座为分体结构。
进一步地，电子膨胀阀还包括压套，设置在阀座上并凸出于阀座的端部设置，压套为环形结构，压套套设在弹簧套的外侧，压套与阀座为一体成型结构，或者压套与阀座为分体结构；阀壳包括阀盖，阀盖的开口部与压套远离阀座的一端连接，螺杆可移动地设置在阀盖内。
进一步地，电子膨胀阀还包括螺母套，螺母套的内壁与导向环的外壁抵接，螺母套上设有连通螺母套的内部空腔与螺母套的外侧空间之间的第一流通孔以及连通螺母套的上端空腔和下端空腔的第二流通孔。
进一步地，阀座靠近导向环的端部具有连接端面，连接端面与导向环连接设置，第一平衡孔位于连接端面的边缘处，以使第一平衡孔形成侧方开口孔结构。
进一步地，弹簧套的侧壁上设置有第二平衡孔。
应用本申请的技术方案，阀壳具有容纳腔和阀口，螺母套设置在容纳腔内，螺杆与螺母套螺纹连接，螺杆的第二端与阀针组件连接且螺杆驱动阀针组件封堵或打开阀口，压力弹簧设置在阀针组件与螺母套之间。采用上述结构，压力弹簧能够使螺杆和螺母套的螺纹连接处始终保持两者的螺纹的上侧面相抵接，或始终保持两者的螺纹的下侧面相抵接，这样使螺杆相对螺母套向上或向下移动的过程中，螺杆相对螺母套的位置不受螺纹间隙的影响，从而使阀针组件打开阀口的程度不受螺纹间隙的影响，进而能够避免在螺杆向上、向下移动过程中螺杆转动至同一位置时阀针组件打开阀口的程度不同，这样能够使电子膨胀阀的流量控制精度较高。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了根据本申请实施例提供的电子膨胀阀的结构示意图；
图2示出了图1中A部分的局部放大图；
图3示出了根据本实用新型的实施例提供的电子膨胀阀的局部结构的结构示意图；
图4示出了图3中的局部结构的爆炸图；
图5示出了根据本实用新型的实施例提供的螺杆、轴承和弹簧套的安装结构示意图；
图6示出了根据本实用新型的实施例提供的轴承套设在螺杆上的结构示意图；
图7示出了图3中的结构安装在安装基体上的结构示意图。
其中，上述附图包括以下附图标记：
10、阀壳；11、容纳腔；12、阀口；13、阀芯套；131、主体部；132、定位部；14、阀座；141、阀座的第一端；142、阀座的第二端；143、第二通孔；144、第一平衡孔；15、阀盖；151、容纳部；152、阀盖的第二端；153、阀盖的第一端；16、流量调节环；17、阀芯；171、安装接触面；172、避让面；173、内壁面；20、螺母套；21、第一通孔；211、螺纹段；212、导向段；22、第一流通孔；23、第二流通孔；30、螺杆；31、螺杆的第一端；32、螺杆的第二端；41、弹簧套；411、第二平衡孔；42、阀针本体；421、连接端；4211、连接凸起部；422、封堵端；423、环形凹陷部；424、环形密封圈；425、密封接触部；43、轴承；431、内圈；432、外圈；44、连接件；441、连接件的第一段；442、连接件的第二段；45、缓冲弹簧；50、压力弹簧；60、导向环；70、第二密封件；80、第三密封件；100、安装基体；120、压套。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。以下对至少 一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1和图2所示，本申请的实施例一提供一种电子膨胀阀，包括阀壳10、螺母套20、螺杆30、阀针组件和压力弹簧50。阀壳10具有容纳腔11和阀口12，阀口12与容纳腔11连通；螺母套20设置在容纳腔11内，螺母套20固定连接在阀壳10上；螺杆30具有相对设置的第一端和第二端，螺杆的第一端31远离阀口12设置，螺杆30穿设在螺母套20内并与螺母套20螺纹连接；阀针组件对应阀口12设置，螺杆的第二端32与阀针组件连接，螺杆30驱动阀针组件封堵或打开阀口12；压力弹簧50设置在阀针组件与螺母套20之间，压力弹簧50能够使螺杆30的螺纹与螺母套20的螺纹相贴合。压力弹簧50始终保持压缩状态或伸长状态。在本申请中，若压力弹簧50始终保持压缩状态，采用压力弹簧50能够使螺杆30的螺纹的下侧面始终保持与螺母套20的螺纹的下侧面相抵接；若压力弹簧50始终保持伸张状态，则压力弹簧50能够使螺杆30的螺纹的上侧面始终保持与螺母套20的螺纹的上侧面相抵接。因此，采用压力弹簧50，能够使螺杆30在向上移动过程中和向下移动的过程中，螺杆30相对螺母套20的位置不受螺纹间隙的影响，从而能够使螺杆30在向上移动过程中和向下移动过程中，阀针组件打开阀口的程度不受螺纹间隙的影响，进而保证电子膨胀阀的流量控制的精度较高。
应用本申请的技术方案，阀壳10具有容纳腔11和阀口12，螺母套20设置在容纳腔11内，螺杆30与螺母套20螺纹连接，螺杆的第二端32与阀针组件连接且螺杆30驱动阀针组件封堵或打开阀口12，压力弹簧50设置在阀针组件与螺母套20之间。采用上述结构，压力弹簧50能够使螺杆30和螺母套20的螺纹连接处始终保持两者的螺纹的上侧面相抵接，或始终保持两者的螺纹的下侧面相抵接，这样使螺杆30相对螺母套20向上、向下移动的过程中，螺杆30相对螺母套20的位置不受螺纹间隙的影响，从而使阀针组件打开阀口12的程度不受螺纹间隙的影响，进而能够避免在螺杆30向上、向下移动过程中，螺杆30移动至同一位置时阀针组件打开阀口12的程度不同，这样能够使电子膨胀阀的流量控制精度较高。此外，上述技术方案还具有结构简单、制造成本低、安装简单等优点。
在本实施例中，螺母套20具有沿轴向延伸的第一通孔21，第一通孔21包括螺纹段211和导向段212，螺纹段211远离阀口12设置，导向段212的内部设有与阀壳10的至少部分连接的导向环60，压力弹簧50的两端分别与导向环60和阀针组件相抵接。螺纹段211与螺杆30螺纹连接。阀针组件穿设在导向环60内，导向环能够对阀针组件进行导向，从而能够提高阀针组件与阀口12的同轴度。此外，导向环60设置在导向段212的内壁上，压力弹簧50的两端分别与导向环60和阀针组件相抵接，这样能够使压力弹簧50的直径较小，从而能够防止压力弹簧50与容纳腔11的内壁相互摩擦。可选地，导向环60通过焊接连接在螺母套20上，也可通过一体注塑成型使两者固定连接在一起。
具体地，阀针组件包括第一段和第二段，阀针组件的第一段的外径小于阀针组件的第二段的外径，阀针组件的第二段靠近阀口12设置，阀针组件的第一段与螺杆的第二端32连接， 且可移动地设置在导向环60内，压力弹簧50套设在阀针组件的第一段的外侧，压力弹簧的一端与导向环60抵接，压力弹簧50的另一端与阀针组件的第二段的远离阀口12的一端抵接。导向环60用于对阀针组件的第一段进行导向。采用上述结构，由于阀针组件的第一段的外径小于阀针组件的第二段的外径，所以压力弹簧50的两端分别与导向环60和阀针组件的第一段的端面相抵接，且压力弹簧50套设在阀针组件的第一段上，这样能够使电子膨胀阀内部的结构紧凑，占用空间小，从而使电子膨胀阀的整体体积较小，还能够使压力弹簧50的结构稳定性较好。
在本实施例中，阀针组件包括阀针本体42和弹簧套41，阀针本体42包括相对设置的连接端421和封堵端422，连接端421与弹簧套41连接，阀针本体42靠近阀口12设置，弹簧套41形成阀针组件的第一段，阀针本体42形成阀针组件的第二段，弹簧套41与导向环60为间隙配合，压力弹簧50套设在弹簧套41的外侧，压力弹簧50的一端与连接端421抵接，连接端421与弹簧套41固定连接，封堵端422对应阀口12设置。即，压力弹簧设置在阀针本体42的连接端421和导向环60之间。且导向环60对弹簧套41进行导向，以使螺杆30驱动弹簧套41和阀针本体42沿轴向移动。在其他实施例中，还可将压力弹簧50设置在弹簧套41和螺母套20之间。
在本实施例中，阀针组件还包括轴承43，轴承43设置在弹簧套41内，轴承43包括内圈431和外圈432，内圈431套设且固定连接在螺杆的第二端32上，弹簧套41的内壁与外圈432间隙配合，弹簧套41的内壁用于对外圈432进行导向。设置轴承43，使内圈431随螺杆30转动的同时，外圈432、弹簧套41和阀针本体42不随螺杆30旋转，这样减少了外圈432、弹簧套41和阀针本体42与其他零部件相互摩擦，延长了装置整体的使用寿命。弹簧套41的内壁用于对外圈432进行导向，这样使轴承43随螺杆30沿轴向移动时轴承43和螺杆30不会歪斜，从而能够提高螺杆30与阀口12的同轴度，进而能够提高阀针组件与阀口的同轴度。
在本实施例中，阀针组件还包括沿轴向顺次设置的连接件44和缓冲弹簧45，缓冲弹簧45靠近阀口12设置，连接件44和缓冲弹簧45均位于弹簧套41内，连接件44包括第一段和第二段，连接件的第二段442靠近阀口12设置，连接件的第一段441的直径大于连接件的第二段442的直径，连接件的第一段441与外圈432相抵接，缓冲弹簧45的一端套设在连接件的第二段442的外侧，并与连接件的第一段441的端面相抵接，缓冲弹簧45的另一端与阀针本体42抵接。采用上述结构设置，能够使连接件44、缓冲弹簧45和外圈432之间的结构稳定性较好，从而能够使阀针组件的整体结构稳定性好。连接件44用于连接缓冲弹簧45和外圈432，可选地，连接件44内设置有通孔，通孔用于避让内圈431和螺杆的第二端32。缓冲弹簧45用于缓冲螺杆30和阀针本体42之间的推力，避免阀针本体42封堵阀口12后，螺杆30继续向下移动过度挤压阀针本体42。
具体地，连接端421的端面上设置有连接凸起部4211，连接凸起部4211穿设在弹簧套41内，连接凸起部4211与弹簧套41的内壁固定连接。连接凸起部4211穿设在弹簧套41内且与弹簧套41的内壁固定连接，这样使阀针本体42稳固地连接在弹簧套41内，从而使阀针本体42与弹簧套41之间的结构稳定性更好。连接凸起部4211与弹簧套41之间可通过焊接连接。
具体地，阀壳10包括阀芯套13、阀座14和阀盖15。阀口12设置在阀芯套13上。阀座14内具有第二通孔143，阀座14具有相对设置的第一端和第二端，阀座的第二端142与阀芯套13固定连接，第二通孔143与阀口12连通，阀针本体42设置在第二通孔143内，阀针本体42的外壁与第二通孔143的内壁导向配合；阀盖15内设置有容纳部151，阀盖15具有相对设置的第一端和第二端，阀盖的第二端152与阀座的第一端141固定连接，容纳部151与第二通孔143连通且两者形成容纳腔11。采用上述结构，方便了电子膨胀阀的内部零部件的安装。螺母套20可固定连接在阀座的第一端141的端面上，方便了螺母套20的安装。阀针本体42的外壁与第二通孔143的内壁导向配合，这样第二通孔143可对阀针本体42进行导向，进一步提高了阀针本体42和阀口12的同轴度。阀盖的第一端153为封堵状态，即容纳部151的顶部为封堵状态。在本实施例中，阀芯套13和阀座14之间设置有流量调节环16和阀芯17，流量调节环16靠近阀座14设置，且位于阀针本体42的外侧，阀芯17靠近阀口12设置，阀针本体42封堵阀口12时，与阀芯17相抵接，阀芯17可以为软密封垫。流量调节环16具有流通通孔，流通通孔对应阀口12设置，通过调整流通通孔内壁的形状可调节电子膨胀阀的流量特性曲线；阀芯17用于实现阀口12的软密封，避免阀口12处于关闭状态时电子膨胀阀内泄漏。
在本实施例中，导向环60与阀座14一体化设置，导向环60上设置有连通孔，容纳腔11内处于导向环60上方和下方的区域通过连通孔进行连通。具体地，阀针本体42的外壁设置有环形凹陷部423，环形凹陷部423内设置有环形密封圈424，环形密封圈424用于对第二通孔143的内壁和阀针本体42的外壁之间进行密封。环形凹陷部423内设置环形密封圈424，能够避免环形密封圈424脱离阀针本体42。设置环形密封圈424，能够防止流体进入弹簧套41和第二通孔143之间，从而防止了流体腐蚀压力弹簧，提高了压力弹簧的使用寿命。
在本实施例中，阀针本体42的连接端421的端面上还设置有限位凸起，限位凸起环形设置在弹簧套41的外周，压力弹簧50位于限位凸起内侧。设置限位凸起，使压力弹簧50位于限位凸起和弹簧套41之间，能够对压力弹簧50进行导向，从而能够防止压力弹簧50扭曲变形。
如图3至图7所示，本申请的实施例二提供了一种电子膨胀阀，该电子膨胀阀还包括阀芯17和驱动组件，阀针本体42安装在阀座14内。阀芯17安装在阀座14内，且阀芯17安装在阀座14的一端。阀芯17套设在阀针本体42上，阀芯17形成阀口，具体的，阀芯17的中空结构形成阀口。驱动组件驱动阀针本体42轴向移动以开闭阀口。其中，阀芯17的材料硬度小于阀针本体42的材料硬度，阀芯17靠近阀针本体42的端部设置有安装接触面171和避让面172，安装接触面171与避让面172之间形成台阶结构。阀芯17的内壁面173或避让面172形成密封面，密封面与阀针本体42的外壁面接触以形成软密封结构。具体地，安装接触面171用于与电子膨胀阀的其他部件进行配合接触，以通过电子膨胀阀的其他部件对安装接触面171进行定位。
采用这样的结构设置，由于阀芯17的材料硬度小于阀针本体42的材料硬度，这样便于使得密封面与阀针本体42的外壁面之间形成了软密封结构，这样，通过该软密封结构能够有 效避免阀芯17和阀座14之间发生泄漏，提高了电子膨胀阀的密封性能。此外，由于在安装接触面171和避让面172之间设置有台阶结构，这样使得电子膨胀阀的其他部件通过安装接触面171对阀芯17进行接触定位，电子膨胀阀的其他部件不会与避让面172进行直接接触，进而避免了在安装时由于安装接触面171被安装压缩而导致避让面172或阀芯17的内壁面173发生变形的情况，使得密封面不会发生变形，减少了压装力对密封面的影响，更好地提高了电子膨胀阀的密封性能。此外，由于安装接触面与密封面并不为相同或直接相连的面，也能够避免阀芯17的材料在与电子膨胀阀的其他部件接触时因热胀冷缩导致对密封面的影响，以便于进一步提高电子膨胀阀的密封性能。因此，通过本实施例提供的技术方案，能够解决现有技术中的电子膨胀阀的密封性能较差的技术问题。
具体地，可以使安装接触面171凸出于避让面172设置以形成台阶结构。
在本实施例中，阀针本体42靠近阀芯17的端部设置有密封接触部425，密封接触部425与密封面接触以形成软密封结构，密封接触部425为弧形结构。采用这样的结构设置，由于阀芯17的材料硬度小于阀针本体42的材料硬度，通过将密封接触部425设置为弧形结构，能够防止阀针本体42划伤阀芯17，提高阀芯的耐久性和使用寿命。
优选地，本实施例中的密封接触部425位于阀针本体42的端部和阀针本体42的外侧壁之间的连接处，密封接触部425为圆弧过渡结构。采用这样的结构设置，能够便于更好地阀针本体42划伤阀芯17，提升了自定心效果，提升了阀口处的密封性能，减少了对阀芯17的磨损，以便于更好地提高阀芯17的耐久性，进而便于有效提高电子膨胀阀整体的使用寿命。
在本实施例中，阀芯17由非金属材料制成，阀芯17的内壁或端面(端面可以指上端面、或下端面、或上端面和下端面)形成密封面，密封面与阀针本体42的外壁面形成软密封结构。采用这样的结构设置，由于密封面与阀针本体42的外壁面之间形成软密封结构，这样，通过该软密封结构能够避免阀芯17和阀座14之间发生泄漏，提高了电子膨胀阀的密封性能。具体的，本实施例中的阀芯17主要由塑胶材料制成，这样，非金属材料制成的阀芯17和金属材料制成的阀针本体42在安装好后，非金属材料相对于金属材料而言为软性材料，这样硬性材料和软性材料安装在一起后能够便于提高密封性能。另外，由于阀芯17由非金属材料制成，这样使得阀芯17和阀座14之间也能够形成软密封结构，从而便于更好地提高电子膨胀阀的密封性能。
在本实施例中，可以使阀座14与安装接触面171抵接以固定阀芯17，以提高阀芯17的限位稳定性，避免阀芯17在工作过程中发生晃动的情况。
具体的，本实施例中的阀芯17由聚四氟乙烯材料制成，以便于更好地提高电子膨胀阀的密封性能。
在本实施例中，阀座14具有沿轴向相对设置的第一安装口和第二安装口，阀座14上还设置有径向贯通阀座14的连通通道，第一安装口位于第二安装口的上方，连通通道设置于阀座14的侧壁并位于第一安装口与安装口之间，第二安装口的截面面积大于第一安装口的截面面积，第二安装口的外形与阀芯17的外形相适配，以使阀芯17安装在第二安装口处。采用 这样的结构设置，在安装时，将阀芯17从第二安装口处直接进行安装即可，便于进行安装操作。由于阀芯17可从第二安装口处安装，因而阀芯可以设置为大口径，从而实现大流量流通。
具体的，阀座14为环形结构，本实施例中的阀座14为圆环结构。
具体的，本实施例中的密封面为锥形面，阀芯17具有相对设置的第一端和第二端，第一端位于第二端的上方，沿第一端至第二端的延伸方向上，密封面的流通面积逐渐减小。采用这样的结构设置，能够便于提高阀芯17和阀针本体42之间的密封性能，减小阀芯17和阀针本体42之间的泄漏情况。
在本实施例中，阀针本体42内设有平衡通道以平衡阀针本体42两端压力，阀针本体42和阀座14之间设置有环形密封圈424，以便于更好地提高密封性能从而在闭阀状态下实现阀针上下端压力平衡。该环形密封圈424对应为第一密封件。
具体的，本实施例中的电子膨胀阀还包括缓冲弹簧45、螺杆30和轴承43，弹簧套41的一端套设在阀针本体42的端部，缓冲弹簧45安装在弹簧套41内。螺杆30设置在弹簧套41的另一端；轴承43套设在螺杆30上，轴承43位于螺杆30和弹簧套41之间。采用这样的结构设置，采用这样的结构设置，由于螺杆30和弹簧套41之间设置有轴承43，阀芯17与阀座14之间为软密封，这样使得阀芯17与螺杆30之间的摩擦力小于阀芯17与阀座14之间的摩擦力，避免了软密封阀口的磨损问题。
在本实施例中，该电子膨胀阀的驱动组件包括转子组件、螺母组件，转子组件套设在螺母组件外侧，螺杆30远离阀针本体42的一端与转子组件固定连接，转子组件通过螺杆带动阀针本体42轴向移动从而调节阀口的开度。螺母组件内设有内螺纹与阀针本体42螺纹连接，并且螺母组件通过连接件与阀座14固定连接。
在本实施例中，电子膨胀阀还包括阀芯套13，阀芯套13的至少部分安装在第二安装口内，阀芯套13位于阀芯17远离阀针本体42的一端。采用这样的结构设置，将现有的一体式阀座14结构改为分体式结构，便于进行安装操作。同时，通过阀芯套13结构能够便于对阀芯17进行定位，以提高阀芯17的设置稳定性，从而便于提高结构整体的性能。阀芯套13也可以套设在第二安装口外，只要能实现阀芯套13与阀针本体42即可。
具体的，本实施例中的阀芯套13包括主体部131和定位部132，主体部131的至少部分插设在第二安装口内，主体部131的端部抵接在阀芯17的端部。定位部132凸出于主体部131的外壁设置，定位部132用于与阀座14的端部进行抵接定位。采用这样的结构设置，能够便于更好地对阀芯17进行定位操作，提高阀芯17的设置稳定性。
优选的，本实施例中的主体部131和定位部132为一体成型结构，以便于进行生产和制造。
在本实施例中，定位部132与阀座14的端部通过焊接连接，以进一步提高对阀芯17的定位稳定性，也提高了阀芯套13的设置稳定性。
具体的，本实施例中的电子膨胀阀还包括安装基体100，安装基体100具有安装通道，阀座14、阀芯17和阀芯套13均安装在安装通道内。其中，可以在安装基体100和阀座14之间设置有第二密封件70。或者，可以在安装基体100和阀芯套13之间设置有第三密封件80。或者，可以在安装基体100和阀座14之间设置有第二密封件70，在安装基体100和阀芯套13之间设置有第三密封件80。
优选地，本实施例中在安装基体100和阀座14之间设置有第二密封件70，在安装基体100和阀芯套13之间设置有第三密封件80。采用这样的结构设置，能够便于更好地提高电子膨胀阀的密封性能。
在本实施例中，安装基体100为阀体或安装台，具体的安装情况可以根据实际使用进行确定。
本实施例中的阀芯17为软密封材料，以解决泄漏问题。阀组件为倒装结构，即将阀芯17从底部往上装配，以实现大流量以及内平衡(便于开阀)，阀座结构为分体结构(阀座结构包括阀座和阀芯套，阀座和阀芯套为两个零部件以形成分体结构)，通过阀座14、阀芯17和阀芯套13的设置解决阀口泄漏的问题。本实施例中的阀芯17为大口径结构，且阀芯17和阀针本体42之间基本没有相对运作，减少了阀芯17和阀针本体42之间的摩擦，防止软密封材料即阀芯17的磨损。
如图3至图7所示，本实施例的电子膨胀阀还包括导向环60。导向环60设置在阀座14上，导向环60上设置有导向通道，弹簧套41沿导向通道的延伸方向可移动地设置在导向通道内。其中，阀座14上设置有第一平衡孔144，以通过第一平衡孔144贯通阀座14的内部空腔与阀座14的外部空间设置。
采用本实施例提供的电子膨胀阀，通过设置导向环60，并在导向环60上设置有导向通道，能够便于使得弹簧套41沿着导向通道的延伸方向进行移动，从而便于对弹簧套41的移动方向进行限定，避免弹簧套41的运动发生偏移，进而避免了阀针本体42的运动发生偏移，避免阀针本体42发生晃动，提高阀针本体42运动的稳定性。优选地，可以通过使导向通道的壁面与弹簧套41的外壁之间的间隙控制在较小的合理范围内，能够实现导向通道对弹簧套41的限位和导向作用。此外，通过设置第一平衡孔144能够使得阀座14的上端空腔以及阀座14的内部空腔，使得阀座14的上端空腔压力能够与阀座14的内部空腔压力实现平衡，从而便于提升阀针本体42的上部空腔压力的平衡速度，实现快速平衡，避免了压力急剧变化导致的开关出现困难的情况。因此，通过本实施例提供的技术方案，能够解决现有技术中的电子膨胀阀的阀针的运动稳定性较差的技术问题。
具体地，导向环60和阀座14为一体成型结构，以便于进一步提高同轴度。或者，导向环60和阀座14为分体结构，以便于进行加工和安装。
在本实施例中，电子膨胀阀还包括压套120和阀盖15(又可以称为套管)，压套120设置在阀座14上并凸出于阀座14的端部设置，压套120为环形结构，压套120套设在弹簧套41 的外侧。阀盖15的开口部与压套120远离阀座14的一端连接，螺杆30可移动地设置在阀盖15内。采用这样的结构设置，能够便于提高阀盖15的设置稳定性。
具体地，压套120与阀座14为一体成型结构，以便于更好地提高结构设置稳定性。或者，压套120与阀座14为分体结构，以便于进行加工和安装。
具体地，本实施例中的驱动组件包括螺母套20，螺母套20的内壁与导向环60的外壁抵接，导向环60的外壁与螺母套20内壁抵接，安装时可通过导向环60对螺母套20进行导向安装，提升阀针本体42与阀口的同轴度。具体地，阀座14靠近导向环60的端部具有连接端面，连接端面与导向环60连接设置，第一平衡孔144位于该连接端面的边缘处，以使第一平衡孔144形成侧方开口孔结构。通过从连接端面边缘处加工侧方开口孔结构，使得第一平衡孔不会产生朝向阀座14内腔的毛刺，从而可以因毛刺损坏阀针及影响阀针开闭的问题。具体地，第一平衡孔144位于连接端面远离导向环60的边缘处。
具体地，本实施例中的弹簧套41的侧壁上设置有第二平衡孔411。采用这样的结构设置，通过该第二平衡孔411能够连通阀口与阀座14的内部空腔，之后通过第一平衡孔144与转子腔相连通，转子腔即为阀盖15围成的腔体，进而便于实现阀针上下压力的快速平衡，减少压力突变时阀针本体42受到的不平衡压力。
在本实施例中，在螺母套20上设有连通螺母套20的内部空腔与螺母套20的外侧空间之间的第一流通孔22、连通螺母套20的上端空腔和下端空腔的第二流通孔23。具体地，螺母套20的下端空腔即为阀座14的上端空腔，螺母套20的上端空腔即为转子腔。因此，转子腔通过多条流通通道实现转子腔与阀口的连通，以便实现阀针本体42的上下压力的快速平衡。转子腔可以通过第一流通孔22、阀座14的上端空腔、第一平衡孔144、阀座的内部空腔、第二平衡孔411、弹簧套41的内部空腔及阀针本体42的平衡通道实现与阀口的连通；或者转子腔通过第二流通孔23、螺母套20的内部空腔、弹簧套41的内部空腔、阀针本体42的平衡通道实现与阀口的连通；或者转子腔通过第二流通孔23、螺母套20的内部空腔、导向环60与弹簧套41之间间隙、阀座14的内部空腔、第二平衡孔411、弹簧套41的内部空腔、阀针本体42的平衡通道以实现与阀口的连通。
需要说明的是，本实施例中的所指的上端和下端均以附图中的结构的绘制方向一致，例如阀针本体42位于阀芯套13的上方。
从以上的描述中，可以看出，本实用新型上述的实施例实现了如下技术效果：减少了泄漏，提高了电子膨胀阀的密封效果。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。
除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本申请的范围。同时，应当明白，为了便于描述，附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为授权说明书的一部分。在这里示出和讨论的所有示例中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它示例可以具有不同的值。应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
在本申请的描述中，需要理解的是，方位词如“前、后、上、下、左、右”、“横向、竖向、垂直、水平”和“顶、底”等所指示的方位或位置关系通常是基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，在未作相反说明的情况下，这些方位词并不指示和暗示所指的装置或元件必须具有特定的方位或者以特定的方位构造和操作，因此不能理解为对本申请保护范围的限制；方位词“内、外”是指相对于各部件本身的轮廓的内外。
为了便于描述，在这里可以使用空间相对术语，如“在……之上”、“在……上方”、“在……上表面”、“上面的”等，用来描述如在图中所示的一个器件或特征与其他器件或特征的空间位置关系。应当理解的是，空间相对术语旨在包含除了器件在图中所描述的方位之外的在使用或操作中的不同方位。例如，如果附图中的器件被倒置，则描述为“在其他器件或构造上方”或“在其他器件或构造之上”的器件之后将被定位为“在其他器件或构造下方”或“在其他器件或构造之下”。因而，示例性术语“在……上方”可以包括“在……上方”和“在……下方”两种方位。该器件也可以其他不同方式定位(旋转90度或处于其他方位)，并且对这里所使用的空间相对描述作出相应解释。
此外，需要说明的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本申请保护范围的限制。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (21)

  1. 一种电子膨胀阀，其特征在于，包括：
    阀壳(10)，具有容纳腔(11)和阀口(12)，所述阀口(12)与所述容纳腔(11)连通；
    螺母套(20)，所述螺母套(20)设置在所述容纳腔(11)内，所述螺母套(20)固定连接在所述阀壳(10)上；
    螺杆(30)，所述螺杆(30)具有相对设置的第一端和第二端，所述螺杆(30)穿设在所述螺母套(20)内并与所述螺母套(20)螺纹连接；
    阀针组件，对应所述阀口(12)设置，所述螺杆的第二端(32)与所述阀针组件连接，所述螺杆(30)驱动所述阀针组件封堵或打开所述阀口(12)；
    压力弹簧(50)，设置在所述阀针组件与所述螺母套(20)之间，所述压力弹簧(50)能够使所述螺杆(30)的螺纹与所述螺母套(20)的螺纹相贴合。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述螺母套(20)具有沿轴向延伸的第一通孔(21)，所述第一通孔(21)包括螺纹段(211)和导向段(212)，所述螺纹段(211)远离所述阀口(12)设置，所述导向段(212)的内部设有与所述阀壳(10)的至少部分连接的导向环(60)，所述压力弹簧(50)的两端分别与所述导向环(60)和所述阀针组件相抵接。
  3. 根据权利要求2所述的电子膨胀阀，其特征在于，所述阀针组件包括第一段和第二段，所述阀针组件的第一段的外径小于所述阀针组件的第二段的外径，所述阀针组件的第二段靠近所述阀口(12)设置，所述阀针组件的第一段与所述螺杆的第二端(32)连接，且可移动地设置在所述导向环(60)内，所述压力弹簧(50)套设在所述阀针组件的第一段的外侧，所述压力弹簧的一端与所述导向环(60)抵接，所述压力弹簧(50)的另一端与所述阀针组件的第二段的远离所述阀口(12)的一端抵接。
  4. 根据权利要求3所述的电子膨胀阀，其特征在于，所述阀针组件包括阀针本体(42)和弹簧套(41)，所述阀针本体(42)包括相对设置的连接端(421)和封堵端(422)，所述连接端(421)与所述弹簧套(41)连接，所述阀针本体(42)靠近所述阀口(12)设置，所述弹簧套(41)形成所述阀针组件的第一段，所述阀针本体(42)形成所述阀针组件的第二段，所述弹簧套(41)与所述导向环(60)为间隙配合，所述压力弹簧(50)套设在所述弹簧套(41)的外侧，所述压力弹簧(50)的一端与所述连接端(421)抵接，所述封堵端(422)对应所述阀口(12)设置。
  5. 根据权利要求4所述的电子膨胀阀，其特征在于，所述连接端(421)的端面上设置有连接凸起部(4211)，所述连接凸起部(4211)穿设在所述弹簧套(41)内，所述连接凸起部(4211)与所述弹簧套(41)的内壁固定连接。
  6. 根据权利要求4所述的电子膨胀阀，其特征在于，所述阀壳(10)包括：
    阀芯套(13)，所述阀口(12)设置在所述阀芯套(13)上；
    阀座(14)，所述阀座(14)内具有第二通孔(143)，所述阀座(14)具有相对设置的第一端和第二端，所述阀座的第二端(142)与所述阀芯套(13)固定连接，所述第二通孔(143)与所述阀口(12)连通，所述阀针本体(42)设置在所述第二通孔(143)内，所述阀针本体(42)的外壁与所述第二通孔(143)的内壁导向配合；
    阀盖(15)，所述阀盖(15)内设置有容纳部(151)，所述阀盖(15)具有相对设置的第一端和第二端，所述阀盖的第二端(152)与所述阀座的第一端(141)固定连接，所述容纳部(151)与所述第二通孔(143)连通且两者形成所述容纳腔(11)。
  7. 根据权利要求6所述的电子膨胀阀，其特征在于，所述阀针本体(42)的外壁设置有环形凹陷部(423)，所述环形凹陷部(423)内设置有环形密封圈(424)，所述环形密封圈(424)用于对所述第二通孔(143)的内壁和所述阀针本体(42)的外壁之间进行密封。
  8. 根据权利要求4所述的电子膨胀阀，其特征在于，所述阀针本体(42)的所述连接端(421)的端面上还设置有限位凸起，所述限位凸起环形设置在所述弹簧套(41)的外周，所述压力弹簧(50)位于所述限位凸起内侧。
  9. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀针组件包括阀针本体(42)，所述阀壳(10)包括：
    阀座(14)，所述阀针本体(42)安装在所述阀座(14)内；
    阀芯(17)，安装在所述阀座(14)的一端，所述阀芯(17)具有所述阀口(12)；
    其中，所述阀芯(17)的材料硬度小于所述阀针本体(42)的材料硬度，所述阀芯(17)靠近所述阀针本体(42)的端部设置有安装接触面(171)和避让面(172)，所述安装接触面(171)与所述避让面(172)之间形成台阶结构，所述阀芯(17)的内壁面(173)或所述避让面(172)形成密封面，所述密封面与所述阀针本体(42)的外壁面接触以形成软密封结构。
  10. 根据权利要求9所述的电子膨胀阀，其特征在于，所述安装接触面(171)凸出于所述避让面(172)设置以形成所述台阶结构。
  11. 根据权利要求9所述的电子膨胀阀，其特征在于，所述阀针本体(42)靠近所述阀芯(17)的端部设置有密封接触部(425)，所述密封接触部(425)与所述密封面接触以形成所述软密封结构，所述密封接触部(425)为弧形结构。
  12. 根据权利要求11所述的电子膨胀阀，其特征在于，所述密封接触部(425)位于所述阀针本体(42)的端部和所述阀针本体(42)的外侧壁之间的连接处，所述密封接触部(425)为圆弧过渡结构。
  13. 根据权利要求9所述的电子膨胀阀，其特征在于，所述阀芯(17)由非金属材料制成，所述阀座(14)与所述安装接触面(171)抵接以固定所述阀芯(17)。
  14. 根据权利要求9所述的电子膨胀阀，其特征在于，所述阀座(14)具有沿轴向相对设置的第一安装口和第二安装口以及径向贯通所述阀座(14)的连通通道，所述第一安装口位于所述第二安装口的上方，所述连通通道设置于所述阀座的侧壁并位于所述第一安装口与第二安装口之间，所述第二安装口的截面面积大于所述第一安装口的截面面积，所述第二安装口的外形与所述阀芯(17)的外形相适配，以使所述阀芯(17)安装在所述第二安装口处。
  15. 根据权利要求9所述的电子膨胀阀，其特征在于，所述阀芯(17)的内壁面(173)为锥形面，所述阀芯(17)的内壁面(173)形成所述密封面，所述阀芯(17)具有相对设置的第一端和第二端，所述第一端位于所述第二端的上方，沿所述第一端至所述第二端的延伸方向上，所述密封面的流通面积逐渐减小。
  16. 根据权利要求9所述的电子膨胀阀，其特征在于，所述阀针本体(42)内设有平衡通道以平衡所述阀针本体(42)两端压力。
  17. 根据权利要求14所述的电子膨胀阀，其特征在于，所述阀壳(10)还包括：阀芯套(13)，所述阀芯套(13)的至少部分安装在所述第二安装口内，所述阀芯套(13)位于所述阀芯(17)远离所述阀针本体(42)的一端；所述阀芯套(13)包括：
    主体部(131)，所述主体部(131)的至少部分插设在所述第二安装口内，所述主体部(131)的端部抵接在所述阀芯(17)的端部；
    定位部(132)，凸出于所述主体部(131)的外壁设置，所述定位部(132)用于与所述阀座(14)的端部进行抵接定位，所述定位部(132)与所述阀座(14)的端部通过焊接连接。
  18. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀壳(10)包括阀座(14)和阀芯(17)，所述阀芯(17)安装在所述阀座(14)的一端，所述阀芯(17)形成阀口；所述阀针组件包括：阀针本体(42)、弹簧套(41)和缓冲弹簧(45)，所述阀针本体(42)安装在所述阀座(14)内，所述缓冲弹簧(45)安装在所述弹簧套(41)内，所述螺杆(30)可活动地安装在所述弹簧套(41)的一端，所述弹簧套(41)的另一端与所述阀针本体(42)连接；所述电子膨胀阀还包括：
    导向环(60)，设置在所述阀座(14)上，所述导向环(60)上设置有导向通道，所述弹簧套(41)沿所述导向通道的延伸方向可移动地设置在所述导向通道内；
    其中，所述阀座(14)上设置有第一平衡孔(144)，以通过所述第一平衡孔(144)贯通所述阀座(14)的内部空腔与所述阀座(14)的外部空间设置。
  19. 根据权利要求18所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括压套(120)，设置在所述阀座(14)上并凸出于所述阀座(14)的端部设置，所述压套(120)为环形结构，所述压套(120)套设在所述弹簧套(41)的外侧，所述压套(120)与所述阀座(14)为一体成型结构，或者所述压套(120)与所述阀座(14)为分体结构；
    所述阀壳(10)包括阀盖(15)，所述阀盖(15)的开口部与所述压套(120)远离所述阀座(14)的一端连接，所述螺杆(30)可移动地设置在所述阀盖(15)内。
  20. 根据权利要求19所述的电子膨胀阀，其特征在于，所述螺母套(20)的内壁与所述导向环(60)的外壁抵接，所述螺母套(20)上设有连通所述螺母套(20)的内部空腔与所述螺母套(20)的外侧空间之间的第一流通孔(22)以及连通所述螺母套(20)的上端空腔和下端空腔的第二流通孔(23)。
  21. 根据权利要求18所述的电子膨胀阀，其特征在于，所述阀座(14)靠近所述导向环(60)的端部具有连接端面，所述连接端面与所述导向环(60)连接设置，所述第一平衡孔(144)位于所述连接端面的边缘处。
PCT/CN2023/081980 2022-03-16 2023-03-16 电子膨胀阀 WO2023174380A1 (zh)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN202220573034.X 2022-03-16
CN202220573034.XU CN219345507U (zh) 2021-03-17 2022-03-16 电动阀
CN202220586991.6U CN219345508U (zh) 2021-03-17 2022-03-17 电动阀
CN202220586991.6 2022-03-17
CN202220654238.6 2022-03-24
CN202220654238.6U CN217301805U (zh) 2022-03-24 2022-03-24 电子膨胀阀

Publications (1)

Publication Number Publication Date
WO2023174380A1 true WO2023174380A1 (zh) 2023-09-21

Family

ID=82936663

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/081980 WO2023174380A1 (zh) 2022-03-16 2023-03-16 电子膨胀阀

Country Status (2)

Country Link
CN (1) CN217301805U (zh)
WO (1) WO2023174380A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN217301805U (zh) * 2022-03-24 2022-08-26 盾安汽车热管理科技有限公司 电子膨胀阀

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014137127A (ja) * 2013-01-18 2014-07-28 Fuji Koki Corp 電動弁
CN104791497A (zh) * 2014-01-20 2015-07-22 浙江三花股份有限公司 一种直动式电动阀
CN107304843A (zh) * 2016-04-18 2017-10-31 浙江盾安人工环境股份有限公司 电子膨胀阀
CN107631033A (zh) * 2016-07-19 2018-01-26 株式会社鹭宫制作所 电动阀
CN210123018U (zh) * 2019-06-12 2020-03-03 浙江盾安禾田金属有限公司 电子膨胀阀
CN217301805U (zh) * 2022-03-24 2022-08-26 盾安汽车热管理科技有限公司 电子膨胀阀

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014137127A (ja) * 2013-01-18 2014-07-28 Fuji Koki Corp 電動弁
CN104791497A (zh) * 2014-01-20 2015-07-22 浙江三花股份有限公司 一种直动式电动阀
CN107304843A (zh) * 2016-04-18 2017-10-31 浙江盾安人工环境股份有限公司 电子膨胀阀
CN107631033A (zh) * 2016-07-19 2018-01-26 株式会社鹭宫制作所 电动阀
CN210123018U (zh) * 2019-06-12 2020-03-03 浙江盾安禾田金属有限公司 电子膨胀阀
CN217301805U (zh) * 2022-03-24 2022-08-26 盾安汽车热管理科技有限公司 电子膨胀阀

Also Published As

Publication number Publication date
CN217301805U (zh) 2022-08-26

Similar Documents

Publication Publication Date Title
WO2023174380A1 (zh) 电子膨胀阀
CN219345508U (zh) 电动阀
US20230417340A1 (en) Electric valve
JP2023551273A (ja) 電子膨張弁及び冷却機器
JP2023503404A (ja) 電子膨張弁
EP3872380A1 (en) Electronic expansion valve
WO2019154342A1 (zh) 电子膨胀阀
US20240060567A1 (en) Electric valve
WO2024088152A1 (zh) 电磁阀
CN212455694U (zh) 阀装置
WO2020132967A1 (zh) 电子膨胀阀
WO2023088254A1 (zh) 电子膨胀阀
WO2023134750A1 (zh) 电磁阀
WO2022100569A1 (zh) 电动阀
WO2019179519A1 (zh) 电子膨胀阀
CN211667158U (zh) 一种流量控制阀
CN216158306U (zh) 电子膨胀阀
CN211667172U (zh) 一种电动阀
CN212564642U (zh) 阀装置
CN110375098B (zh) 一种可调节集成安全阀式减压器
US20210396435A1 (en) Electronic expansion valve
WO2023179797A1 (zh) 电磁截止阀
WO2023030337A1 (zh) 电子膨胀阀
WO2023036253A1 (zh) 电磁阀
CN219013532U (zh) 一种阀门可活动的节流阀

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23769882

Country of ref document: EP

Kind code of ref document: A1